HAPI (HL7 application programming interface; pronounced "happy") is an open-source, object-oriented HL7 2.x parser for Java. HL7 (http://hl7org) is a messaging specification for healthcare information systems. This project is not affiliated with the HL7 organization; we are just writing some software that conforms to their specification. The project was initiated by University Health Network (a large multi-site teaching hospital in Toronto, Canada).

The api that is re-used across web and modules

OpenXDS Main/Core

A library implementing the HL7 api

An OpenMRS module implementing the server-side functionality of the MoTeCH project.

Integrates with McKesson PACS system